Mycat下載可以到官網下載也可以到github上下載

下載路徑：

Mycat安裝

MyCat安裝，需要安裝jdk

上傳並解壓

把MyCat的壓縮包上傳到linux伺服器，並且解壓

安裝步驟

我的安裝在/usr/local

首先把你的進入你MyCat壓縮包的目錄下（我的在/opt/install）

[[email protected] local]# cd /opt/install

[[email protected] install]# tar -xvf Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz -C /usr/local   usr/local

 //解壓並複製到/usr/local

[[email protected] install]# cd /usr/local

[[email protected] local]# ls

bin  etc  games  include  lib  lib64  libexec  mycat  sbin  share  src

[[email protected] local]# cd mycat

[[email protected] mycat]# cd bin

[[email protected] bin]# ./mycat -start     //啟動mycat

Usage: ./mycat { console | start | stop | restart | status | dump }

[[email protected] mycat]# pwd

/usr/local/mycat

[[email protected] mycat]# cd conf

[[email protected] conf]# vi server.xml         //這一步可以省略

<user name="root">
<!--預設使用者：root 密碼：123456-->
                <property name="password">123456</property>
                <property name="schemas">TESTDB</property>
        </user>
<!--預設使用者：user 密碼：user-->
        <user name="user">
                <property name="password">user</property>
                <property name="schemas">TESTDB</property>
                <property name="readOnly">true</property>
        </user>
 

mysql> create table tb_user(id int,name varchar(30),password varchar(30)); ERROR 1495 (HY000): User readonly

如果出現這個錯可以這樣修改，或者用root登入

注意：

1、這裡配置的是可以連線主庫的兩個使用者

使用者：root   密碼：oldboy 給予此使用者test資料庫增刪改查的許可權。  

使用者：user 密碼：oldboy 給予此使用者test資料庫讀的許可權。 

2、這裡的TESTDB，不一定是你資料庫上的真實庫名，可以任意指定，只要接下來和schema.xml的配置檔案的庫名統一即可

[[email protected] conf]# cd ..

[email protected] mycat]# cd bin

[[email protected] bin]# ./mycat restart  //重啟mycat

Stopping Mycat-server...

Mycat-server was not running.

[[email protected] bin]# firewall-cmd --permanent --add-port=8066/tcp     //mycat預設埠8066，開啟8066埠

Warning: ALREADY_ENABLED: 8066:tcp

success

[[email protected] bin]# firewall-cmd --reload   //重新載入

success

[[email protected] conf]# vi schema.xml

 <dataHost name="localhost1" maxCon="1000" minCon="10" balance="0"
                          writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
                <heartbeat>select user()</heartbeat>
                <!-- can have multi write hosts -->
                <writeHost host="hostM1" url="localhost:3306" user="root"
                                   password="admin">
                        <!-- can have multi read hosts -->
                        <readHost host="hostS2" url="192.168.1.200:3306" user="root" password="xxx" />
                </writeHost>
                <writeHost host="hostS1" url="localhost:3316" user="root"
                                   password="123456" />
                <!-- <writeHost host="hostM2" url="localhost:3316" user="root" password="123456"/> -->
        </dataHost>

[[email protected] bin]# mysql -uuser -puser -P8066 -h192.168.19.60
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.29-mycat-1.6-RELEASE-20161028204710 MyCat Server (OpenCloundDB)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> quit;

也可以連線mysql的圖形化工具了：如圖

啟動

/usr/local/mycat/bin      ./mycat start    啟動
/usr/local/mycat/bin      ./mycat stop     停止
/usr/local/mycat/bin     ./mycat restart  重啟